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Abstract

Symbiotic species of fish and plants are identified, which will give the greatest yield of production when co-cultivated with minimal external impact. The regularity of fish growth rate in various climatic, hydrochemical and ichthyological conditions and the fish-biological indicators of tilapia, clareef catfish, carp and sturgeon fish during growing in a aquapon plant were estimated. The installation of closed water supply was re-equipped, by constructive replacement of a biological filter, using denitrifying bacteria, on a phytofilter that absorbs metabolic products by plant roots.